The general Kerr-NUT-(A)dS spacetime in five dimensions includes all stationary black holes with
spherical horizon topology and arbitrary values of mass, angular momentum, NUT charge and
cosmological constant.
In this section we compute the Weyl spinor for these spacetimes and show that it can be written as the double copy
of a Maxwell field. If we interpret the field as living on the curved
spacetime instead of on the flat background (as is otherwise usual for single copies, see [1]}, [2]}, [3]}, [4]}, [5]}, [6]}, [7]} for examples
where the field lives on a curved background), it turns out to belong to a
previously known class of Maxwell fields on Kerr-NUT-(A)dS which are aligned along the principal tensor of the
spacetime [8]}.
